Fresh off a blowout quarter and the early repayment of a government loan, Musk is already on his next move to prove his critics wrong.

On Wednesday evening at the D: All Things Digital conference, Musk announced that he is dramatically ramping up the expansion of Tesla’s ultrafast charging network, the company’s collection of stations that rapidly refill the batteries on its electric cars. By the end of next month, Musk said, Tesla will roughly triple its charger coverage area.